Arizona MAX-5000XL user manual Stored Data Menu, Analyze Stored Data

5.2. Stored Data Menu

This function is used to work with data stored in the instrument from past tests. Up to 1,000 test results and 100 graphs can be stored before the oldest is "pushed out" (overwritten). To access this function, go to the Main Menu and select the STORED DATA MENU. On 21 CFR, Part 11 compliant units, the DELETE is not available.

Delete Stored Data (Not available on 21 CFR, Part 11 compliant units)

This function is used to delete individual results and is non-reversible. Normally results are deleted to make management of the data easier. If the test results need to be saved, they should first be printed or stored in a computer file. Moving the selector bar to a particular test and pressing [DELETE] will erase the record so be careful! If the list is empty, the screen will show EMPTY.

Analyze Stored Data

Mean, Standard Deviation, and Relative Standard Deviation are calculated using the following formulas available on many hand calculators.

Mean = total of results divided by number of results.

Standard Deviation =	Σ(	x	- x)2
	n - 1

Relative Standard Deviation expressed as percentage = Standard

Deviation divided by Mean, multiplied by 100%

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